After starring together in the 1999 hit rom-com Notting Hill, Julia Roberts and Hugh Grant were at the center of intense media scrutiny regarding their real-life relationship.

The two actors brought the romance between their characters to life in such a way that the press wondered whether there were any real flames there behind the scenes.

While only Roberts and Grant know what really went on between them while they were making the London-based film, it's been reported that there was some tension on the set (not romantic tension) that caused the two actors to be at odds with each other.

Reportedly, the minor feud came down to Grant's habit of commenting too candidly on his female co-stars' appearances.

So what exactly went on between Julia Roberts and Hugh Grant back then, and where do the two stand today? Are they even friends? Keep reading to find out!

Julia Roberts And Hugh Grant Worked Together On 'Notting Hill'

The '90s were a big decade for both Julia Roberts and Hugh Grant. Roberts had hits like Pretty Woman and My Best Friend's Wedding behind her, while Grant had also starred in a string of rom-coms, from Four Weddings and a Funeral to Nine Months. The two stars came together in 1999 to create what would become a beloved romantic classic: Notting Hill.

Set in London's prestigious suburb, the film follows the story of bookshop owner William Thacker who falls in love with movie star Anna Scott after she stumbles into his shop.

William and Anna try to overcome the numerous hurdles in their way to embrace their feelings for each other and live happily ever after.

Julia Roberts And Hugh Grant Clashed Behind The Scenes

Although Notting Hill is thought of as the ultimate romantic comedy, the ambiance behind the scenes wasn't so romantic. Cheat Sheet reports that the two stars did not get on as well in real life as their characters did on screen, owing mainly to jokes and comments that Grant made about Roberts.

In an interview with Oprah Winfrey, Grant reportedly described Roberts as "very big-mouthed." He went on to say, "Literally, physically, she has a very big mouth.

When I was kissing her I was aware of a faint echo."

By 2005, Julia Roberts And Hugh Grant Had Reconciled

Grant's comments are said to have caused tension behind the scenes of Notting Hill. But by 2005, it seems that all had been forgiven.

Roberts revealed that she had forgiven her former co-star for his "cruel" comments about her appearance and was open to the possibility of working with him again.

Hugh Grant Doesn't Consider Them Friends

Despite Roberts setting the record straight in 2005, Grant still doesn't consider Roberts to be his friend.

When asked about where the two stand during an episode of Watch What Happens Live 11 years later, Grant said (via Mamamia), "I've probably made too many jokes about the size of her mouth.

She might hate me by now."

Hugh Grant Falls Out With Most Female Co-Stars

Interestingly, Julia Roberts isn't the only co-star that Hugh Grant has rubbed up the wrong way. As Mamamia reports, he has fallen out with several of his female co-stars over the years. And Grant has no problem admitting that he isn't in the good books with many of them.

When asked to describe his co-stars in three words, he said, "Julianne Moore: Brilliant actress. Loathes me. Rachel Weisz: Clever. Beautiful. Despises me. Drew Barrymore: Made her cry. Stunning film-star face. Hates me."

But he did say that Renée Zellweger is the best kisser he's ever encountered.

He Would Be Down For A 'Notting Hill' Sequel On One Condition

Even though there may have been tension on the set of Notting Hill, Hugh Grant has revealed that he would be down for a sequel with his former co-star, on one condition. He would like the film to focus on what he believes would really happen after Happily Ever After.

"I would like to do a sequel to one of my own romantic comedies that shows what happened after one of those films ended," he said (via News). "Really, to prove the terrible lie that they all were, that it was a happy ending."

When coming up with a possible plot for a Notting Hill sequel, Grant theorized, "I'd like to do me and Julia and the hideous divorce that's ensued with really expensive lawyers, children involved in (a) tug of love, flood of tears. Psychologically scarred forever. I'd love to do that film."

As has been noted in the media, Grant considers himself to be a very different person from the typical romantic characters he has traditionally portrayed in romantic comedies.